diff options
Diffstat (limited to 'arch/arm/mach-imx')
| -rw-r--r-- | arch/arm/mach-imx/gpc.c | 217 |
1 files changed, 0 insertions, 217 deletions
diff --git a/arch/arm/mach-imx/gpc.c b/arch/arm/mach-imx/gpc.c index 1dc2a34b9dbd..93f584ba0130 100644 --- a/arch/arm/mach-imx/gpc.c +++ b/arch/arm/mach-imx/gpc.c @@ -10,26 +10,17 @@ * http://www.gnu.org/copyleft/gpl.html */ -#include <linux/clk.h> -#include <linux/delay.h> #include <linux/io.h> #include <linux/irq.h> #include <linux/irqchip.h> #include <linux/of.h> #include <linux/of_address.h> #include <linux/of_irq.h> -#include <linux/platform_device.h> -#include <linux/pm_domain.h> -#include <linux/regulator/consumer.h> #include <linux/irqchip/arm-gic.h> #include "common.h" #include "hardware.h" -#define GPC_CNTR 0x000 #define GPC_IMR1 0x008 -#define GPC_PGC_GPU_PDN 0x260 -#define GPC_PGC_GPU_PUPSCR 0x264 -#define GPC_PGC_GPU_PDNSCR 0x268 #define GPC_PGC_CPU_PDN 0x2a0 #define GPC_PGC_CPU_PUPSCR 0x2a4 #define GPC_PGC_CPU_PDNSCR 0x2a8 @@ -39,18 +30,6 @@ #define IMR_NUM 4 #define GPC_MAX_IRQS (IMR_NUM * 32) -#define GPU_VPU_PUP_REQ BIT(1) -#define GPU_VPU_PDN_REQ BIT(0) - -#define GPC_CLK_MAX 6 - -struct pu_domain { - struct generic_pm_domain base; - struct regulator *reg; - struct clk *clk[GPC_CLK_MAX]; - int num_clks; -}; - static void __iomem *gpc_base; static u32 gpc_wake_irqs[IMR_NUM]; static u32 gpc_saved_imrs[IMR_NUM]; @@ -296,199 +275,3 @@ void __init imx_gpc_check_dt(void) gpc_base = of_iomap(np, 0); } } - -static void _imx6q_pm_pu_power_off(struct generic_pm_domain *genpd) -{ - int iso, iso2sw; - u32 val; - - /* Read ISO and ISO2SW power down delays */ - val = readl_relaxed(gpc_base + GPC_PGC_GPU_PDNSCR); - iso = val & 0x3f; - iso2sw = (val >> 8) & 0x3f; - - /* Gate off PU domain when GPU/VPU when powered down */ - writel_relaxed(0x1, gpc_base + GPC_PGC_GPU_PDN); - - /* Request GPC to power down GPU/VPU */ - val = readl_relaxed(gpc_base + GPC_CNTR); - val |= GPU_VPU_PDN_REQ; - writel_relaxed(val, gpc_base + GPC_CNTR); - - /* Wait ISO + ISO2SW IPG clock cycles */ - ndelay((iso + iso2sw) * 1000 / 66); -} - -static int imx6q_pm_pu_power_off(struct generic_pm_domain *genpd) -{ - struct pu_domain *pu = container_of(genpd, struct pu_domain, base); - - _imx6q_pm_pu_power_off(genpd); - - if (pu->reg) - regulator_disable(pu->reg); - - return 0; -} - -static int imx6q_pm_pu_power_on(struct generic_pm_domain *genpd) -{ - struct pu_domain *pu = container_of(genpd, struct pu_domain, base); - int i, ret, sw, sw2iso; - u32 val; - - if (pu->reg) - ret = regulator_enable(pu->reg); - if (pu->reg && ret) { - pr_err("%s: failed to enable regulator: %d\n", __func__, ret); - return ret; - } - - /* Enable reset clocks for all devices in the PU domain */ - for (i = 0; i < pu->num_clks; i++) - clk_prepare_enable(pu->clk[i]); - - /* Gate off PU domain when GPU/VPU when powered down */ - writel_relaxed(0x1, gpc_base + GPC_PGC_GPU_PDN); - - /* Read ISO and ISO2SW power down delays */ - val = readl_relaxed(gpc_base + GPC_PGC_GPU_PUPSCR); - sw = val & 0x3f; - sw2iso = (val >> 8) & 0x3f; - - /* Request GPC to power up GPU/VPU */ - val = readl_relaxed(gpc_base + GPC_CNTR); - val |= GPU_VPU_PUP_REQ; - writel_relaxed(val, gpc_base + GPC_CNTR); - - /* Wait ISO + ISO2SW IPG clock cycles */ - ndelay((sw + sw2iso) * 1000 / 66); - - /* Disable reset clocks for all devices in the PU domain */ - for (i = 0; i < pu->num_clks; i++) - clk_disable_unprepare(pu->clk[i]); - - return 0; -} - -static struct generic_pm_domain imx6q_arm_domain = { - .name = "ARM", -}; - -static struct pu_domain imx6q_pu_domain = { - .base = { - .name = "PU", - .power_off = imx6q_pm_pu_power_off, - .power_on = imx6q_pm_pu_power_on, - }, -}; - -static struct generic_pm_domain imx6sl_display_domain = { - .name = "DISPLAY", -}; - -static struct generic_pm_domain *imx_gpc_domains[] = { - &imx6q_arm_domain, - &imx6q_pu_domain.base, - &imx6sl_display_domain, -}; - -static struct genpd_onecell_data imx_gpc_onecell_data = { - .domains = imx_gpc_domains, - .num_domains = ARRAY_SIZE(imx_gpc_domains), -}; - -static int imx_gpc_genpd_init(struct device *dev, struct regulator *pu_reg) -{ - struct clk *clk; - int i, ret; - - imx6q_pu_domain.reg = pu_reg; - - for (i = 0; ; i++) { - clk = of_clk_get(dev->of_node, i); - if (IS_ERR(clk)) - break; - if (i >= GPC_CLK_MAX) { - dev_err(dev, "more than %d clocks\n", GPC_CLK_MAX); - goto clk_err; - } - imx6q_pu_domain.clk[i] = clk; - } - imx6q_pu_domain.num_clks = i; - - /* Enable power always in case bootloader disabled it. */ - imx6q_pm_pu_power_on(&imx6q_pu_domain.base); - - if (!IS_ENABLED(CONFIG_PM_GENERIC_DOMAINS)) - return 0; - - imx6q_pu_domain.base.states = devm_kzalloc(dev, - sizeof(*imx6q_pu_domain.base.states), - GFP_KERNEL); - if (!imx6q_pu_domain.base.states) - return -ENOMEM; - - imx6q_pu_domain.base.states[0].power_off_latency_ns = 25000; - imx6q_pu_domain.base.states[0].power_on_latency_ns = 2000000; - imx6q_pu_domain.base.state_count = 1; - - for (i = 0; i < ARRAY_SIZE(imx_gpc_domains); i++) - pm_genpd_init(imx_gpc_domains[i], NULL, false); - - ret = of_genpd_add_provider_onecell(dev->of_node, - &imx_gpc_onecell_data); - if (ret) - goto power_off; - - return 0; - -power_off: - imx6q_pm_pu_power_off(&imx6q_pu_domain.base); -clk_err: - while (i--) - clk_put(imx6q_pu_domain.clk[i]); - imx6q_pu_domain.reg = NULL; - return -EINVAL; -} - -static int imx_gpc_probe(struct platform_device *pdev) -{ - struct regulator *pu_reg; - int ret; - - /* bail out if DT too old and doesn't provide the necessary info */ - if (!of_property_read_bool(pdev->dev.of_node, "#power-domain-cells")) - return 0; - - pu_reg = devm_regulator_get_optional(&pdev->dev, "pu"); - if (PTR_ERR(pu_reg) == -ENODEV) - pu_reg = NULL; - if (IS_ERR(pu_reg)) { - ret = PTR_ERR(pu_reg); - dev_err(&pdev->dev, "failed to get pu regulator: %d\n", ret); - return ret; - } - - return imx_gpc_genpd_init(&pdev->dev, pu_reg); -} - -static const struct of_device_id imx_gpc_dt_ids[] = { - { .compatible = "fsl,imx6q-gpc" }, - { .compatible = "fsl,imx6sl-gpc" }, - { } -}; - -static struct platform_driver imx_gpc_driver = { - .driver = { - .name = "imx-gpc", - .of_match_table = imx_gpc_dt_ids, - }, - .probe = imx_gpc_probe, -}; - -static int __init imx_pgc_init(void) -{ - return platform_driver_register(&imx_gpc_driver); -} -subsys_initcall(imx_pgc_init); |